Reel arbor



De c. 16, 1941. c.. BRUESTLE REEL ARBOR Filed Dec. 23, 1959 II I in llll f MEI.

INVENTOR 677/?4 0. 89055715 Patented Dec. 16, 1941 Carl 0, ass g pr i This invention relates to: reet aIbOIB' fOR -Wi-HCIIP ing machines, and especially to the reel arbors of high speed machines for winding Wire, and provides improvements therein In winding the 1 finer sizes of Wiref the reel arbor is operated at speeds ranging fro'm about 2000 to 8000'revolutionsper m-inu-te- -To--av1cid vibrationof the arbors andreela-especially at the higher speeds, it is necessary that the-reels+be very carefully centered -on the driving-arbor, The reels for these high speed.machines areeaw curately formed, being :nianufactu-red true- -to specifications, the arbor shaft beinggroun d to size, and the reel dynamicallybalanced Heretofore the useful life of the spools has--been limited. Shocks transmitted to the r'eel=in start- 7 ing and stopping the reel arbor, -disto'rt theree'l and the driving connections =-between-the-arbor 'andthe reel (which 'is usuallya pin-and slot a ra'ngement), and'when this occurs, the reels-must bediscarded. 1 1

In v my: application a Serial Numbep29flg29'7; (Se ries of..1935) I have shown and disclesed an -img proved reel arbor. The present invention' is -an alternative, and, ilikeethat showmand described f inlsaid application Serial 'Number 297-;297; provides) a l-reel arbor constructed so that the reel'i's securely fastened and held .I-in -a I truly-centered position on the arbor; in such manner-that the reelsis :not distorted or injuredby the sudden starting and stopping 'ofethearbor',- and the-reel is. thereby. 'givenaan increased useful life. 1

.Theminventionyfurther prov-ides ia meansfor quickly and: readily mountingg=and-dism0i1hting thexireelazf'rom the arbor shaftt 'I -he invention may further include:- safety- =means for-preventing the axial disp1acement of -the reelcaseofi-aecidental i loosening of l the driving connection between. the .reel and-the arbor-during rotation, or

in.case of failure to fasten the reel on-the-arbor mounted,=as in thewall or partition I11 and a back wall POI iJQiIZtL I alrespectivelynta wire: drawingsmachine i The. arbor: has thereon a n. cylindrical; pore- ;tion vflit. 1 The iportionill is- :preferably' iofea idipametenwhichiclos'elw correspondsito theidiameter :of thetborezofi a spool v'or: reel. to-'.be .used.: thereon, and on.which thespool orereel fits. with azsli'g t 'c1ea1'ance2 ;;when;i placed ion. the. arbor. 1 A eflang'e 12h 0n: the arbor; may be provided :forilimitin'g. zthe epositiontof-sthe spool or .reelgaxially 10f ;the...arbor. The cylindricaLaportion-twlflt isLIor-med with a ooncentricnhollow, .lportion n231fifldxWitha plurality'eotl longitudinal; iSlOtS or openings: -.,sym.- metrically spaced;v radially: around the axis; of; the iarbor. ;As herelrshowm-zrthere areuthree 'of ethese radially :,symmetrically spaced;.s1otsn;2'5;a 13;;21. iBarsg-mszthe bars ;::3;l:; 32 izareulocatedinthe openingafi 5;: 2 8 and :2:T,-';and.are arranged tohave ta? limitedazradial; movement in theeopeningsand, when; projected; toe extend" slightly;.beyondithe surface not; :theecylindrical portion a of; the a reel, 1 to :contactamitm the-'lsurfacezofcthe .reel atL-theface .oftsthegboreithereih, I

Means are providedyafor -.simultane.ously and zadiallyzproj ectingggthe contactoiubarsv 3.0;.13 I 32 into lbihdingrcontactzwiththe spool mureel W1 hin its-bored These means .comprise blocks-5365311,

z-and means,.-asalscrewqshafthjflgfor:impartingsh ae er bar' gfl u tratedhaean. in line. Plane .9

an;.iW-atea henstnndeach10 w s gitfl ha z hm in n d rn neslfifin erecnr s a d. t cOIEfiPQUdWithjhG angu a -se t n ht e oniaqtor i ars Ma l 27, l n a e n: t e- QJGJI- e am 4 h t e ds oft-moon: tactor.. ;bars ,30; 31,32 ,r the cams F46 (on-the blocks il-c 1; d-t read m z :0 thehaft re m i a e ote -1 mpar m z et a mqr mentsm t e oat cterhb re 7 h .h 5 9lss.;3 i

. nunduae ehare; a

and at the same time be accurately guided by the surface 23.

Means are provided for limiting the outward movement of the contactor bars 39, 3|, 32, and. also for causing the contactor bars to follow the action of the cams. The contactor bars move radially inward and outward corresponding to the action of the cams. To this end, screws 59 pass through openings 52 in each of the contactor bars 39, 3|, 32. The screws are fastened at their inner ends to a collar 53 which is loose on the shaft 49. The contactor bars. 39, 3|, 32 have bores 54 concentric with each of the holes 52, forming an inner shoulder 59. A coil spring 69 is provided within the bore 54 between the head 62 of the screw and the. shoulder 56, and" the action of the coil spring 69 isto normally press the contactor bar radially inward against the cams on the blocks 35, 31. limiting the outward movement of the contactor bars 39, 3|, 32 may be, as here shown afshoulder 51 on the screw 59 coacting with the shoulder 56 on a contactor bar. The shoulders 55, 51 serve to prevent the contactor bars from flying out, and also to limit the projecting of the contactor bars to a small amount,. in case the arbor should be rotated without a reel or spool thereon. The screws 59 are prevented from turning and becoming loose by a pin 95 which fits in a hole .running transversely through the head 62 of the screw. In order that the outer surface of the contactor bar may be unobstructed, the head 62 of the screw 59 fits within the bore 54, and the outer part of the contactor bar is provided with a slot 9! extending across the bore 54, into which slot the projecting ends of the pin 55'extend. In order to obtain a firm bearing between the contactor bars and the spool or reel, the inte rmediate portions of the contactor bars may be made slightly undersized, as indicated at 69, the contact with the spool or reel being made within the bore, at opposite sides or ends, by the slightly elevated portions II, I2 at the opposite ends of the contactor bars.

Means are also preferably provided for locking the spool or reel on the arbor against axial displacement. The means for operating these means is advantageously combined with the means for operating the contactor bars. The means are also advantageously such that the locking means may be moved independently into locking position by centrifugal force, andinto unlocking position by a manual effort. The locking means, as here shown, comprises one or more latch pieces I5, I6 which slide in grooves 11, 18 across the ends of the cylindrical portion 29 of the arbor. Aforked arm 89 is provided for transmitting motion from the shaft 49 to a latch piece. With two latch pieces I5, 16, the part 89 is provided with two arms, as shown. The latch pieces are provided with pins or projections 82, 83 (here shown as the heads of screws) which project within the forked portions of the arm 89. The forked arm 89 has an opening 95 therein through which the shaft 49 passes, but does not have a threaded connection therewith. To provide an impositive driving connection or friction clutch between the shaft and the forked arm 89, the shaft 49 may be provided with a collar 99 which is fastened thereto in suitable manner as by means of a pin 9|. On the shaft 49,- and spaced from the collar 99 is another collar 94, fastened to said shaft'as by means of -a set screw 95. we Between the collars 99 and-94 is a spiral spring washer 95, on each The means for side of which may be plain washers 98 and 99. The spiral spring washer acts on the collars 99 and 94, through the washers 98 and 99, and also through the forked arm 89, so that there is a frictional contact between said forked arm 89 and the parts on the sides of it, as here shown, the collar 99 and the washer 99.

A cap I99 may be provided to house the parts which project beyond the outer end of the cylindrical portion 29 of the arbor, the cap I99 being secured to the aforesaid portion in suitable manner, as by means of screws I92. The

outer end I of the shaft 49 extends through a hole I96 in the cap, and the outer end I95 of the shaft may be squared or otherwise formed to coact with La tool, as for example a wrench, in

' turning the shaft 49 to operate the contactor bars 39, 3|, 32.

Operation Referring to Fig. 1 of the drawing, the contactor bars are illustrated as slightly extended beyond the surface of the cylindrical portion 29. Toplace a spool on the arbor, the shaft 49 is rotated clockwise when viewed from outside the end of squared shaft. The clockwise rotation of the shaft acts on the forked arm 89 through the impositive driving connection or friction clutch, and causes the said forked arm 89 to turn, and thereby retract the latch pieces I5, I6. The latch pieces I5, I6 could, however, be retracted manually bypressing on them at their exposed ends. The clockwise direction of rotation of shaft 49 also causes the blocks 36, 31 to move apart. The cam surfaces or inclined planes 45 on the contactor bars 39 ride down the cams or inclined faces 46, so that the group of contactor bars 39, 3|, 32 can move radially inward, the inward movement of the contactor bars, in the construction illustrated, being brought about by the action of the spring 69. The radial movement of the contactor bars is symmetrical.

When the contactor bars are retracted,.a spool or reel is placed on the cylindrical portion of the arbor, and moved up against the flange plate 2|.

The shaft 49 is then turned in a counterclockwise direction (as by means of a wrench or crank handle, not shown). Thiscounterclockwise rotation of the shaft 49, moves the latch pieces I5, I6 outwardly, alongside of the spool or reel when its opposite side is against the flange 2|, through the forked arm 89 and the impositive connection or friction clutch heretofore described. The counterclockwise rotation of the shaft 49 also moves the blocks 36, 31 longitudinally of the arbor toward one another, the cam faces or inclined planes 45 riding up the cam faces or inclined planes 49, and causing the contactor bars 39, 3|, 32 to move outward radially and symmetrically. The turning of the shaft 49 in a counterclockwise direction is continued until the contacting'parts (II and 12) of the contactor bars make firm con tact with the spool or reel inside of the bore. After the latch pieces I5, I6 have reached'their limit of outward projection, the shaft 49 can continue to turn by reason of the friction clutch between the shaft and the forked arm 89; Power may then-be applied to the arbor to rotate the spool or reel to wind wire thereon.

The latch pieces I5, I6 during the rotation of the spindle:arexsubjected to the action of centrifugal force in a directionto hold them ex.-

tended. In their extended position they prevent any longitudinal displacement of the spool or reel on the arbor shaft in cases where the contact between contactor bars 30, 3 l, 32 may become loose for any reason, or where the machine may be started before the contactor bars have been extended into binding contact with the reel or spool.

In case the machine is started without a reel or spool on the arbor, the coaction of the shoulders 51 on the screws 53 with the shoulders 56 limits the projection of said contactor bars, and prevents them from being thrown out of the slots 25, 25, 21 by the action of centrifugal force.

The invention may receive other embodiments than that herein specifically illustrated and described.

What is claimed is:

1. A reel arbor for Winding machines, comprising a cylindrical portion over which the central bore of a reel or spool may be mounted on the arbor, a plurality of openings in said cylindrical portion of the arbor symmetrically spaced radially around the axis of the arbor, reel contactors in said openings, and means for simultaneously projecting said reel-contactors into binding contact with the surface portion of the reel within said bore, comprising a rotatable shaft, means for locking a spool on the arbor against longitudinal displacement, and an impositive connection between said locking means and said shaft, said impositive connection acting to allow said shaft to continue its movement after the locking means have reached a limit of movement, and also allowing said locking means to move under the action of centrifugal force independently of the movement of said shaft.

2. A reel arbor according to claim 1, wherein said locking means comprises a locking-piece slidable transversely of the arbor and arranged to be contained within the circumference of the arbor in retracted position, an arm on said shaft, a driving connection between said arm and said locking piece, and a friction-clutch between said shaft and said arm.

3..A reel arbor for high speed winding machines, comprising a unitary cylindrical portion over which the central bore of an accurately formed and dynamically balanced reel may be mounted, said cylindrical portion having a diameter closely corresponding to the diameter of the bore of the reel to be used thereon, and also having a bore accurately centered with its outer cylindrical surface, a plurality of openings in said cylindrical portion symmetrically spaced radially around the axis of the arbor and extending approximately the width of the reel to be used on the arbor, reel contactor bars fitted closely within said openings and extending the length thereof, two oppositely threaded blocks having a bearing on said cylindrical portion within the bore of the latter, one adjacent one end of said reelcontactor bars and the other adjacent the opposite end of said reel contactor bars, a shaft extending through said blocks and having oppositely threaded portions engaging the threads of said blocks, oppositely arranged symmetrical inclined planes on said blocks contacting each of the reel-contactor bars at opposite ends, said threaded shaft, when turned, acting to simultaneously move said blocks to cause said inclined planes to project said reel contactors into binding contact with the surface portion of a reel within the bore thereof.

4. A reel arbor for high speed winding machines, according to, claim 3, further including means for retaining said reel contactor bars against ejection when the arbor runs without a reel thereon, said retaining means comprising a collar on said shaft, headed screws fastened to said collar and passing through countersunk openings in each of said reel contactor bars, a groove in each of said contactor bars crossing said countersunk opening, slotted openings in said screws, and pins passing through said slotted openings and extending into the grooves in said contactor-bars for preventing loosening of said bar-retaining screws.

CARL O. BRUES'I'LE. 

